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SUMMARY:Electromagnetic Dissociation Measurement at LHC with ALICE ZDC (15
 '+5')
DTSTART;VALUE=DATE-TIME:20110607T162000Z
DTEND;VALUE=DATE-TIME:20110607T164000Z
DTSTAMP;VALUE=DATE-TIME:20130521T035215Z
UID:indico-contribution-74@cern.ch
DESCRIPTION:Speakers: DE MARCO\, Nora (INFN and Univers. Torino)\nNew data
  on neutron emission in electromagnetic dissociation  Pb ions at LHC will 
 be presented. The measurement was performed by means of the Zero Degree Ca
 lorimeters (ZDC) of the ALICE experiment\, which consists of two identical
  sets of detectors located at opposite sides with respect to the beam inte
 rsection point\, ~114 m away from it. Each set of detectors include a neut
 ron (ZN) and a proton (ZP) Zero Degree Calorimeter. In particular the ZN i
 s placed at zero degrees with respect to the LHC axis and\ndetects neutral
  particles at pseudorapidities eta>8.7. During the 1.38+1.38 ATeV Pb-Pb da
 ta taking\, a dedicated run has been performed\, requiring a minimum energ
 y deposition in at least one of the two\nZNs. The trigger tagged essential
 ly neutrons emitted in the Coulomb breakup of the excited lead nucleus. Th
 e neutrons from electromagnetic dissociation are expected to be emitted ve
 ry close to beam rapidity and with an average energy close to the one of t
 he beam. Thanks to the good ZN energy resolution\, the measured energy spe
 ctra show a clean separation of the single neutron contribution from the 2
 n\, 3n... ones. The experimental results will be presented and compared to
  theoretical predictions.\n\nhttp://indico.cern.ch/contributionDisplay.py?
 contribId=74&sessionId=6&confId=100963
LOCATION:Perugia Congress Center GIO Main auditorium
URL:http://indico.cern.ch/contributionDisplay.py?contribId=74&sessionId=6&
 confId=100963
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